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Fast direct determination of strontium in seawater using high-performance chelation ion chromatography


Nesterenko, EP and Nesterenko, PN and Paull, B and Melendez, M and Corredor, JE, Fast direct determination of strontium in seawater using high-performance chelation ion chromatography, Microchemical Journal, 111 pp. 8-15. ISSN 0026-265X (2013) [Refereed Article]

Copyright Statement

Copyright 2012 Elsevier

DOI: doi:10.1016/j.microc.2012.09.003


A new method for the fast direct chromatographic determination of strontium in seawater has been developed. Two coupled silica monolithic columns (total dimensions 2004.6 mm I.D.) chemically modified with iminodiacetic acid (IDA) functional groups were used for baseline separation of all alkaline-earth metals in seawater in less than 4 min at flow rate of 4.0 mL min−1, using an eluent containing 0.25 M sodium chloride and 2 mM glycolic acid, pH 5.11. Several colour-forming ligands, including o-cresolphthalein complexone (o-CPC), methylthymol blue (MTB), xylenol orange (XO), 4-(2-pyridylazo)resorcinol (PAR) and ZnEDTA-CPAR were evaluated as reagents for post-column reaction (PCR) based spectrophotometric detection. Sensitivity of the developed method for strontium was at the low mg L−1 level in undiluted seawater samples, in the presence of excessive amounts of calcium and magnesium, using post-column reaction detection with o-CPC at 570 nm. The method allowed quantitative determination of strontium in seawater samples (LOD 3.23 0.15 mg L−1, sr = 4.6%), with direct injection of just 4 μL of seawater onto the chromatographic column.

Item Details

Item Type:Refereed Article
Keywords:Seawater; Strontium; High-performance chelation ion chromatography; Post-column reaction; Monolithic columns
Research Division:Chemical Sciences
Research Group:Analytical chemistry
Research Field:Separation science
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the chemical sciences
UTAS Author:Nesterenko, EP (Dr Ekaterina Nesterenko)
UTAS Author:Nesterenko, PN (Professor Pavel Nesterenko)
UTAS Author:Paull, B (Professor Brett Paull)
UTAS Author:Melendez, M (Ms Melissa Melendez)
ID Code:84714
Year Published:2013
Web of Science® Times Cited:10
Deposited By:Austn Centre for Research in Separation Science
Deposited On:2013-05-29
Last Modified:2014-05-08

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